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09-18-2008, 12:50 PM   #1
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Tamron vs. Sigma 70-300.

Both of these lenses are only about $130 on Amazon, and both seem to be well reviewed there. Anyone have any reason I might prefer one over the other?

09-18-2008, 02:32 PM   #2
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Do a search. There are dozens of threads asking that question, all with the same opinions.
09-19-2008, 09:47 AM   #3
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I fully enjoy my Sigma 70-300 APO. Never used the Tararon.
09-19-2008, 10:30 AM   #4
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QuoteOriginally posted by spanky12 Quote
Both of these lenses are only about $130 on Amazon, and both seem to be well reviewed there. Anyone have any reason I might prefer one over the other?
There are two versions of the Sigma 70-300mm, one being a APO version that sells for closer to $220 (US). The APO version of the Sigms uses three ED glass elements for very low CA/PF. The standard Sigma 70-300mm and Tamron 70-300mm each uses one piece of ED glass and both have higher levels of CA/PF especially the Tamron. However the Tamron is sharper than both of the Sigmas and if your looking at the regular Sigma for sure the Tamron IMO would be the best buy, because its much sharper between 200-300mm.

09-19-2008, 11:26 AM   #5
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QuoteOriginally posted by jamesm007 Quote
However the Tamron is sharper than both of the Sigmas and if your looking at the regular Sigma for sure the Tamron IMO would be the best buy, because its much sharper between 200-300mm.
That being said, don't expect the same performance as higher priced glass between 200-300mm!

I have the Tamron and am relatively happy with it but be forewarned, it can be a purple monster.
09-19-2008, 09:01 PM   #6
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Also of note - I have the Sigma 70-300 APO DG and it's one unruly lens to hand hold. Barrel is so long when fully extended, it gets the shakes regardless of how steady you are.

Also, manual focus is annoyingly lose, so it's very difficult to manually focus and not have it slide on you.

Love it at 70-150, hit or miss at 200-300.
09-19-2008, 10:58 PM   #7
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When I got the tamron 70-300 I posted this thread on dpreview:
Tamron 70-300 DI, why I like this lens (m) [Page 1]: Pentax SLR Talk Forum: Digital Photography Review
Scroll through the whole thread to view an assortment of images and crops. I also have a gallery of images from the k10d and tamron 70-300 LI DI here:
LaRee : photos : San Clemente Canyon Natural Park : The path. Dry, dusty and HOT at 9:30 am- powered by SmugMug
I only post this gallery link because every single image in the gallery was taken using the tamron 70-300 LI DI. It is one of my most versatile and loved lenses.
12-09-2008, 09:45 AM   #8
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Wondering if Tamron 70-300 covers full frame sensor, or just APS-C size.

12-09-2008, 09:52 AM   #9
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QuoteOriginally posted by cbaytan Quote
Wondering if Tamron 70-300 covers full frame sensor, or just APS-C size.
Yes, the Tamron is designed for standard 35mm as well as digital APS-C sensors. Only the Di II (their version of the DA lens) Tamron's are specifically designed for the APS-C sensor camera only.
12-09-2008, 05:04 PM   #10
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QuoteOriginally posted by cbaytan Quote
Wondering if Tamron 70-300 covers full frame sensor, or just APS-C size.
It is a FF lens.
12-09-2008, 06:07 PM   #11
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Never used the Tamron but I've seen good images from it. I had the Sigma APO which needed a big bump in contrast to get a decent image.

The Pentax 55-300 is way better. I stopped using the Sigma, and Pentax 50-200, after getting that lens. (Plus, the Sigma aperture blades broke...)
12-09-2008, 06:23 PM   #12
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I would love to have the Pentax 55-300, but even if I did get it, I would keep my Tamron for the 1:2 Macro option, it is really handy..



12-09-2008, 10:46 PM   #13
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I have currently got Sigma APO version and have owned and used Tamron non-DI version before. I found generally the Sigma is sharper except maybe at the 300mm end. Personally I find Sigma easier to handle than Tamron (from memory, Tamron is bulkier whereas Sigma might be longer when extended. No, I didn't compare them side by side since I never owned both lenses at the same time).

I have got some photos taken with Sigma APO version here that you can have a look:
kjao_photos/Sigma 70-300 DG APO - Photobucket - Video and Image Hosting

cheers
Kenny
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